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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 4 — Feb. 13, 2012
  • pp: 4784–4789

Modulation of the propagation speed of mechanical waves in silicon quantum dots embedded in a silicon-nitride film

C. Torres-Torres, A. López-Suárez, R. Torres-Martínez, A. Rodriguez, J. A. Reyes-Esqueda, L. Castañeda, J. C. Alonso, and A. Oliver  »View Author Affiliations


Optics Express, Vol. 20, Issue 4, pp. 4784-4789 (2012)
http://dx.doi.org/10.1364/OE.20.004784


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Abstract

Using a vectorial picosecond self-diffraction method, we evaluate the modification of the speed of the sound in a silicon-nitride film containing silicon quantum dots prepared by remote plasma-enhanced chemical vapor deposition. Our non-contact technique is based on the stimulation of the electrostriction contribution to the nonlinearity of index exhibited by the sample in a multiwave mixing laser experiment. We identified the electronic birefringence using two of the incident beams to generate a self-diffraction signal, then, we modified the third order nonlinear response by means of the optical Kerr effect given by a phase-mismatched third beam which induced electrostriction. Our results indicated that the speed of the sound in a silicon-nitride film can be simultaneously tailored by an electronic nonlinear refractive index, and by an electrostriction effect, both resulting from silicon quantum dots doping.

© 2012 OSA

OCIS Codes
(160.4330) Materials : Nonlinear optical materials
(190.3270) Nonlinear optics : Kerr effect
(190.4223) Nonlinear optics : Nonlinear wave mixing
(160.4236) Materials : Nanomaterials

ToC Category:
Nonlinear Optics

History
Original Manuscript: December 6, 2011
Revised Manuscript: December 31, 2011
Manuscript Accepted: January 5, 2012
Published: February 10, 2012

Citation
C. Torres-Torres, A. López-Suárez, R. Torres-Martínez, A. Rodriguez, J. A. Reyes-Esqueda, L. Castañeda, J. C. Alonso, and A. Oliver, "Modulation of the propagation speed of mechanical waves in silicon quantum dots embedded in a silicon-nitride film," Opt. Express 20, 4784-4789 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-4-4784


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